产业集群韧性：技术创新、关系治理与市场多元化
俞国军1, 贺灿飞1,2(
), 朱晟君1
), 朱晟君1
Industrial cluster resilience: Technological innovation, relational governance, and market diversification
YU Guojun1, HE Canfei1,2(), ZHU Shengjun1
), ZHU Shengjun1
图3. 1990—2018年D市石油钻采设备集群企业数量
注：数据来源于启信宝（https://www.qixin.com/）网站数据保守筛选。
Fig.3. The number of enterprises in D oil drilling equipment cluster from 1990 to 2018
